The month a workers comp audit repriced my four contractors as employees, at 67K MRR

That was the third email from the premium auditor, and it was the first one I actually read properly. We were four contractors and me, no other W-2 staff, 67K MRR, and I had bought a workers compensation policy for exactly one reason: an enterprise customer's vendor rider would not let us sign without a certificate. I thought I had bought a piece of paper. I had bought an annual examination of how I pay everyone who works on the product.

Quick answer (2026). This diary is a composite. It is assembled from several real companies I have worked in and advised, with numbers and details changed, so no single sentence here describes one identifiable business. The short version is this: a workers compensation premium audit does not ask whether your contractors pass the classification tests you already know. It asks whether each one can produce their own coverage. In California the statutes behind that question are harsher on small low-hazard employers than on anybody else, because the penalty floors are set per head and are completely indifferent to how safe your work is. I found two separate provisions where the floor is larger than the multiplier it sits next to, and in both cases the smaller you are, the higher the multiple you pay.

The audit did not ask the question I had prepared for

I had spent a previous year getting careful about worker classification. I knew the control tests, I knew what a statement of work should say, I had the contracts. None of that was what the auditor wanted. She wanted payroll registers, the general ledger, 1099 totals, and a certificate of insurance for each contractor. The contracts were never requested.

That is the part the carrier guides skate past. They describe the audit as a reconciliation of estimated payroll against actual, which is true and is not the thing that costs money. What costs money is that a contractor who cannot document their own coverage gets added to your payroll for rating. Not for tax. Not for employment law. For premium.

Two provisions nobody reads together

California Labor Code section 3357 is one sentence long:

Section 3357, in full: "Any person rendering service for another, other than as an independent contractor, or unless expressly excluded herein, is presumed to be an employee."

So the default is employment, and independent contractor is the exception you have to reach. Section 3353 supplies the definition you would have to satisfy, and I am citing it in text rather than linking it because the link budget here is spent on the provisions that carry money: it defines an independent contractor as a person who renders service for a specified recompense for a specified result, under the control of his principal as to the result of his work only and not as to the means by which such result is accomplished.

Now read section 5705, which sits in an entirely different part of the code:

Section 5705: "The following are affirmative defenses, and the burden of proof rests upon the employer to establish them", the first of which is "That an injured person claiming to be an employee was an independent contractor or otherwise excluded from the protection of this division".

Put the two side by side and the shape is clear. The status is presumed against you, and rebutting the presumption is an affirmative defence that you carry. There is no mirror provision anywhere that puts the burden on the other side.

State the limit honestly, because it matters: section 5705 sits in Part 4, which governs compensation proceedings before the appeals board. It is not a rule about premium audits. It is the rule about what happens when somebody is hurt and the status question finally gets decided by somebody other than your carrier. That is precisely the moment the answer is expensive.

I went looking for the law that required the audit

I assumed the audit was legally mandated. I went looking for the California section that requires my insurer to examine my payroll every year, and there is exactly one that says so in those terms. It is Insurance Code section 11665, and it applies to a roofing contractor holding a C-39 licence:

Insurance Code 11665(a): "shall perform an annual payroll audit for the contractor. This audit shall include an in-person visit to the place of business of the roofing contractor".

That is the whole statutory audit mandate I could find, and it names one trade. For a software company the annual audit is a right the carrier holds under the policy you signed, not a duty the legislature imposed on it. That does not make the audit improper. It does mean the thing I treated as a rule of nature is a contract term, and contract terms are negotiable in a way statutes are not.

The arithmetic nobody publishes

The audit bill itself was the small number. The large number is what sits behind it, in Labor Code section 3722, which applies when an employer was uninsured rather than under-reported. Subdivision (b) reads:

Section 3722(b): the director shall issue a penalty order for "the greater of (1) twice the amount the employer would have paid in workers' compensation premiums during the period the employer was uninsured, determined according to subdivision (c), or (2) the sum of one thousand five hundred dollars ($1,500) per employee employed during the period the employer was uninsured."

It is a greater-of test, so set the legs equal and solve. Leg two is fifteen hundred dollars per head, so per person the legs cross when the avoided premium reaches seven hundred and fifty dollars. Expressed as a rate, with payroll measured per person, the multiplier leg only takes over once your rate exceeds 75,000 divided by per-person payroll.

Run it on my numbers. Four contractors, 184,000 dollars paid across the policy year, so 46,000 each. I am going to assume a rate of 55 cents per 100 dollars of payroll, and I want to be explicit that this is an assumption and not a measurement: I have not sourced a rate, and your classification and carrier will set yours.

At that assumed rate the premium is 1,012 dollars. Leg one is 2,024 dollars. Leg two is four times fifteen hundred, which is 6,000 dollars. The greater is 6,000, which is 5.93 times the premium avoided. The crossover rate at 46,000 dollars per person is 1.63 dollars per 100, and my assumed rate is nowhere near it.

Here is the part that took me a while to see. The floor is per head and knows nothing about hazard. A roofing business, where the rate is high and the risk is real, lands on leg one and pays exactly twice. A desk business lands on the floor and pays a multiple that rises as the rate falls. The penalty multiple is inversely related to how dangerous the work is.

A cap that excludes the one you would be assessed under

Section 3722 does contain a cap. Subdivision (f):

Section 3722(f): "Except for penalties assessed under subdivision (b), the maximum amount of penalties which may be assessed pursuant to this section is one hundred thousand dollars ($100,000)."

The hundred thousand dollar ceiling is real, it is written down, and it is expressly carved away from subdivision (b), which is the payroll-and-headcount leg. The cap exists and is addressed to the subdivisions you would not be assessed under.

A ceiling lower than its own floor

Section 3700.5 makes failure to secure coverage a misdemeanour, and sets the fine like this:

Section 3700.5(a): "a fine of up to double the amount of premium, as determined by the court, that would otherwise have been due to secure the payment of compensation during the time compensation was not secured, but not less than ten thousand dollars ($10,000)".

Read those two clauses together. The fine is capped at twice the premium and floored at ten thousand dollars. They cross at a premium of five thousand dollars. Below that, the floor is larger than the ceiling, and the words "up to double" do no work at all. On my assumed rate, reaching five thousand dollars of annual premium would take roughly 909,000 dollars of payroll. For a company my size, the cap is decorative and the floor is the number.

The penalty that lands when the claim fails

Subdivision (d) covers what happens if somebody actually files. If the appeals board finds you had not secured coverage:

Section 3722(d)(1): "In noncompensable cases, two thousand dollars ($2,000) per each employee employed at the time of the claimed injury."

Noncompensable means the claim did not succeed. The worker recovers nothing, the injury is not compensable, and the penalty is still two thousand dollars a head. Four people, eight thousand dollars, for a claim that failed.

The number is measured on a date you do not choose

Subdivision (c) sets the payroll when you cannot prove it:

Section 3722(c): "the employer's payroll for each week the employer was uninsured shall be presumed to be the state average weekly wage multiplied by the number of persons employed by the employer at the time the penalty assessment is issued."

Two things there. The payroll is presumed unless you prove otherwise, which is the burden running one way again. And the headcount is taken when the assessment is issued, not during the period being assessed. If you grew between the conduct and the assessment, the penalty for the old, smaller period is computed on the new, larger company. Growth is the aggravating factor.

I looked for the small-business door

I grepped the sections I had pulled for the words that usually mark an escape: de minimis, small business, fewer than, exempt. Across Labor Code 3351, 3352, 3353, 3357, 3700, 3700.5, 3722 and 5705, and Insurance Code 11665, the phrases "small business", "de minimis" and "fewer than" appear zero times. The only occurrence of "exempt" in the exclusions section is a carve-out for volunteers at a recreational camp run by a 501(c)(3). Section 3700 opens flatly:

Section 3700: "Every employer except the state shall secure the payment of compensation".

There is no headcount threshold and no revenue threshold. One employee is enough.

What actually happened

What I got wrong

Four things, and I am recording them because each one cost me a week of reasoning in the wrong direction.

I assumed Insurance Code 11665 was the general audit mandate. It is not. It is roofing-specific and names the C-39 licence. I had it in my notes as the authority for a rule it does not state.

I assumed my classification homework transferred. The tests I had learned answer whether someone is an employee. They do not answer whether your carrier will rate their pay as payroll, which turns on a document your contractor has to hand you and you cannot compel.

I assumed "up to double" was the operative ceiling in section 3700.5. For any company whose annual premium is under five thousand dollars, the ten thousand dollar floor is the operative number and the ceiling never binds. I had read the clause I recognised and skipped the one that governed.

I assumed workers compensation was about injuries. The premium and penalty machinery does not require anyone to be injured. Section 3722(b) runs off payroll and headcount, and subdivision (d)(1) fires even when the claim is found noncompensable.

Limits

This is California. Workers compensation is state law, the statutes differ, and I have not read the other forty-nine. Every rate in this piece is labelled as an assumption because I did not source one. This is a founder's reading of primary text, not legal advice, and it contains no claim about any vendor's pricing or plan tiers because nothing here turns on one.

The one thing I would tell you

Ask your carrier, in writing, before the policy year starts, which of your 1099 relationships they will treat as payroll at audit if no certificate of insurance is produced. That question costs nothing, it is answerable in a sentence, and it is the only input to all of the arithmetic above that you can still change. Every other number in this piece is fixed by a statute, measured on a date you do not choose, and floored at a figure that does not care how safe your work is.